I have obtained zone axis of a crystal from TEM .Also I have calculated texture coefficient from XRD data. how I can establish a relation between these two.
Texture effect as you study from powder XRD is bulk phenomen, averaged one. On the other hand what you determine zone axis from TEM is for a single grain of the sample. So, as such there need not be any correlation between these two studies.
If you have a reference to monocrystalline substrate, or you have several grains (f.e. averaged by SAD ~1um apperture) you can draw some conclusions of preffered orientation in respect to substrate. Try to look to SAD pattern with larger area of interest - they may show some similar behaviour to XRD data